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Finding the Fourth Proportional to 548.18, 756.46 and 299.49

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Solution

The fourth proportional to 548.18, 756.46 and 299.49 is: 413.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.18 : 756.46 = 299.49 : x
  2. Step 2: Convert to fraction form
    548.18/756.46 = 299.49/x
  3. Step 3: Cross multiply
    548.18x = 756.46 × 299.49
  4. Step 4: Simplify right side
    548.18x = 226,549.74
  5. Step 5: Solve for x
    x = 226,549.74/548.18
  6. Step 6: Final answer
    x = 413.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.